Move HugoSites to hugolib

It will get more involved in the build process in a minute.

See #2309

commands/hugo.go

@@ -46,20 +46,10 @@ import (
 	"github.com/spf13/viper"
 )
 
-type HugoSites []*hugolib.Site
-
-// Reset resets the sites, making it ready for a full rebuild.
-// TODO(bep) multilingo
-func (h HugoSites) Reset() {
-	for i, s := range h {
-		h[i] = s.Reset()
-	}
-}
-
 // Hugo represents the Hugo sites to build. This variable is exported as it
 // is used by at least one external library (the Hugo caddy plugin). We should
 // provide a cleaner external API, but until then, this is it.
-var Hugo HugoSites
+var Hugo hugolib.HugoSites
 
 // Reset resets Hugo ready for a new full build. This is mainly only useful
 // for benchmark testing etc. via the CLI commands.

commands/multilingual.go

@@ -11,8 +11,8 @@ import (
 	"github.com/spf13/viper"
 )
 
-func readMultilingualConfiguration() (HugoSites, error) {
-	h := make(HugoSites, 0)
+func readMultilingualConfiguration() (hugolib.HugoSites, error) {
+	h := make(hugolib.HugoSites, 0)
 	multilingual := viper.GetStringMap("Multilingual")
 	if len(multilingual) == 0 {
 		// TODO(bep) multilingo langConfigsList = append(langConfigsList, hugolib.NewLanguage("en"))

hugolib/hugo_sites.go

@@ -0,0 +1,25 @@
+// Copyright 2016-present The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hugolib
+
+// HugoSites represents the sites to build. Each site represents a language.
+type HugoSites []*Site
+
+// Reset resets the sites, making it ready for a full rebuild.
+// TODO(bep) multilingo
+func (h HugoSites) Reset() {
+	for i, s := range h {
+		h[i] = s.Reset()
+	}
+}